Pan-motion belt-concentrator.



K. SEN N.

PAN MOTION BELT CONGENTRATOR.

APPLICATION FILED FEB. 20, 1912.

3 SHEETS-SHEET 1.

Patented Nov. 19, 1912.

mix

I I I l T ifwhh K. SENN. PAN MOTION BELT GONCENTRATOR. APPLICATION FILEDFEB. 20, 1912.

1,044,697. Patented Nov. 19, 1912.

3 SHEETS-SHEET 2.

Patented Nov. 19, 1912.

APPLICATION FILED FEB. 20, 1912.

3 SHEETS-SHEET 3.

KARL SENN, OF ALAMEDA, CALIFORNIA.

PAN-MGTION BELT-CONOENTRATOR.

Specification of Letters Patent.

Application filed February 20, 1912.

Patented Nov. 19, 912. Serial No. 678,856.

To aZZ 707mm it may concern:

Be it known that l, KARL SENN, a citizen of the United States, residingat Alameda. in the county of Alameda and State of California, haveinvented. new and useful Improvements in Pan-Motion Belt-Concentrators,of which the following is a speci- .iication.

This invention relates to concentrating apparatus, and particularly to abelt concentrator having a pan motion.

The object of the present invention is to design an apparatus for theconcentration of minerals of various specific gravities, the apparatusincluding means whereby the concentrated ore may be advanced gradu ally;said means consisting of a flexible belt.

A further object of the invention is to provide means for imparting tosaid belt an advancing intermittent motion, the mechanism having for itsfunction, the movement of the belt in such a manner as to preserve it,thus increasing its life and eiliciency.

Another object is to design an ore concentrating apparatus involvingmeans for imparting to a concentrating belt a substantially circularmotion, and for imparting simultaneously with the circular motion anadvancing motion in one direction, thereby avoiding a direct reversal oftravel of the belt per se.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in which- Figures 1 and 1 areplan views of the apparatus. Fig. 2 is a side View of the same.

It is desirable to provide a concentrator having a flexible endless beltacting as a carrier for the concentrated values of certain ores, and itis particularly desirable to evolve an apparatus for imparting to thebelt an intermittent advancing movement in one direction withoutdirectly re versing the travel of the belt around its supporting drums.To that end I have devised a machine in which the belt 2 is supportedupon upper and lower drums 3, over which the belt travels in onedirection intermittently. The drums 3 are mounted on respective shafts4s-5 which are supported in appropriate journals 6 on a frame 7.

The frame 7 is superposed above and connected to a bed or main frame 8;the super posed frame 7 being connected to the bed 8 by links 9 mountedupon transverse pivots 10 relative to the frames 7 8, and thuspermitting the upper frame 7 to move longitudinally relative to the mainor carrying frame, which will he hereinafter called the carrier 8. Thecarrier 8 is flexibly suspended for lateral or side shake motion bymeans of suitable links 11 which are pivoted 'at their upper ends tosuitable trunnions l2 and connected by pivots 13 to the carrier 8; thetrunnions 12 being arranged in forward and rearward pairs of stanchionsor standards 14 of the apparatus.

From the foregoing it will be the carrier 8 is supported by which areconnected to the lower ends of a plurality of substantially verticallinks 1.1, the upper ends of which are attached to the trunnions 12 inthe standards 14-; and that the belt carrying frame 7 is superposedabove the carrier frame 8 by means of links 9, thus permitting the frame'i" to move longitudinally, but imparting to it the side shake which maybe given to the carrier 8.

Since the belt carrying frame 7 supports the shafts 4-? of the beltdrums il, it Wlll be clear that the belt will be moved backwardly andforwardly uniformly with. the frame 7 and laterally with any side motionof the carrier 8. For the purpose of imparting to the carrier 8 and itssuper posed belt supporting frame 7 a lateral mo tion, there is mountedin standards 14; a main or drivin shaft 15, on the ends of which aremounted eccentrics 16, driving eccentric links 17, "he ends of which areconnected at 18 to the carrier 8. A complete revolution of the shaftwill cause the table or carrier 8 to be laterally shifted a distancesubstantially equal to the throw of the eccentrics 16, and this sidemotion of the carrier 8 will be imparted simultaneously to the frame 7and its belt 2. Simultaneously with the side shake action of the carrier8, an endwise motion is imparted to the belt supporting frame F, bymeans of a l crank or eccentric 20 secured to the driving seen thatshaft 15 and being connected by a link 21 to a bell crank 22, one arm ofwhich is connected, as at 28, to a link 24 pivoted at 25 on thebeltsupporting frame 7. For one complete revolution of the shaft- 15 andits pivots 13 crank 20, the bell crank 22 will be actuated to advanceand return the belt supporting frame 7 a given stroke, which will bedetermined by the throw of the crank 20 and the proportions of the armsof the bell crank 22.

I have found it desirable in demonstrating my invention to so positionthe eccentries 16, which give the side shake, and the crank 20, whichgives the end movement, to the belt supporting frame 7, that when theeccentrics 16 are at their lowermost point of revolution below the shaft15, which will cause the carrier 8 to assume a position midway betweenthe total side shake, the crank will also be at a position in its cyclelowermost relative to the shaft 15, at which time the bell crank 22 willhave been actuated and thrown the belt supporter 7 ahead the maximumthrow.

The operation of action of the carrier 8 and the belt supporter 7 will,for a half revolution of the shaft 15, be as follows: ith the shaftmoving in the direction indicated by the arrow A, Fig. 2, the table orcarrier 25 8 will be shifted to the left to its maximum point ofmovement and back to the center of movement, at which time the crank 20will actuate the bell crank 22 to draw the belt supporter 7 from itsforemost to its rearmost position. The combination of the side shakegiven to the carrier 8 and the superposed belt supporter 7, with thereturn motion of the belt supporter 7 which is independent of the table8, will produce a curve closely approximating a semicircle, which isindicated on Fig. 1 diagrammatically. The remaining half cycle of theshaft 15, which will carry the eccentrics 16 and the crank 20 from ahigh point to a low point, will cause the table or carrier 8 to beshifted from central to right hand position, and then brought back tocenter position, while the crank 20 will advance the belt supporter orframe 7 forwardly simultaneously completing a path approximatelysemicircular and coinciding with the path of travel of the first halfcycle of the shaft 15; the movement of the belt supporter 7 for onecomplete cycle of the shaft 15 forming an outline substantiallycircular, as indicated in Fig. 1.

The mechanism hereinbefore described has for its function the productionin the belt supporting frame 7 of a motion closely approximating a truecircle, and while this motion of itself will facilitate theconcentration of the components of the pulp which may be discharged onthe surface of the belt 2, it will not effect an advance in onedirection of the belt 2, which it is necessary to have in order toseparate the values carried in the pulp from the tailings. For the purpose of imparting an advancing movement to the uppermost stretch of thebelt 2, means are provided whereby the shaft 4:, on which isintermittently moved in one direction, thus feeding or advancing thebelt 2. This mechanism for advancing the belt comprises a crank oreccentric 26, which may be adjustably connected to the shaft 15; tiecrank 26 operating a link 27 which is connected to the outer end of alever arm 28 loosely mounted on the shaft l. T 1e lever arm 28 carries asuitable friction clutch device, as

a roller or pawl 29, which, when the arm is moved upwardly, is adaptedto bind upon the internal surface of the drum 30 secured to the shaft4t; hence, at each upward movement of the crank 26 and link 27, thelever 28 when lifted will force the friction device 29 into locking orbinding engagement with the drum 39 effecting a turning motion of thelatter with the shaft &.

Since the clutch device 29 is effective only during the upward movementof its arm 28, it will be manifest that when the crank 26, whichoperates the arm 28, swings downwardly, the clutch device 29 will beautomatically released and slide freely within the drum 30 withouteffecting a reverse rotation of the drum and its shaft 4.

The upward swing of the crank 26 and the crank driven arm 28 is designedto occur at the time that the bell crank 22 driven by crank 20 isactuated to force or move the belt carrying supporter forwardly, so thatif the belt supporting frame 7 is moved forwardlv, say 1-} inches, itwill also carry the entire belt 2 simultaneously forward the sameamount; at the same time the belt will be shifted by its drums adistance which will be determined by the throw of the crank 26 drivingthe clutch arm 28. The consequence is, that the belt, instead of movingin a true semicircular arc synchronously with the motion of the beltsupporting frame 7, will have a gradual movement forward, due to thecomb'ned action of the crank 20 and the belt advancing crank 26', theadvance of the belt being clearly indicated at B, Fig. 1.

If it be desired to impart to the belt a reverse travel over thesupporting frame 7, to clean the belt, then there may be provided aforwardly projecting arm 31 secured to the hub of the arm 28 andcarrying a friction locking device 32, which will be operative toautomatically clutch the drum 30 during the upward movement of the arm31; this upward movement being imparted through the clutch device 32 tothe drum 30 and its shaft i to reverse the motion of the belt 2 on theframe 7. The locking device 32 is omitted while the machine is ingeneral use and the clutch device 29 is working. When the belt is to becleaned, the device 29 is removed and the back feed device 32 inserted.

For the purpose of obtaining a prelimi- 65 is supported the forward orupper drum 3, nary concentration of the material treated in the machine,a feed hopper 35 is shown as connected substantially to the beltsupporting table, so that the hopper structure is given semicircular ororbital movement simultaneously with the table, this movement veryeffectually concentrating the heavier components of the ore beinghandled.

Having thus described my invention, what I claim and desire to secure byLetters Patent is- 1. The combination in a concentrating apparatus of anendless belt, rotary drums for carrying the belt, a table on which thedrums are mounted, a carrier to which said table is flexibly connectedfor endwise movement independently of the table, a longitudinal shafthaving eccentrics adjacent the ends for imparting a lateral movement tothe carrier, and means at one end of the shaft outside of the eccentricsat that end and a bell crank lever for reciprocating said tablelongitudinally simultaneousl with the lateral movement of the carrier.

2. The combination in a concentrating apparatus, of an endless belt,rotary drumsfor carrying the belt, a table on which the drums aremounted, a carrier to which said table is flexibly connected for endwisemovement independently of the table, a longitudinal shaft and devicesthereon for imparting a lateral movement to the carrier, including aneccentric on the end of the shaft and a bell-crank lever on the carrierconnected to said eccentric for reciprocating said table longitudinallysimultaneously with the lateral movement of the carrier, and means forshifting said belt and operative upon said drums during the forwardreciprocation of the table.

3. The combination in a concentrating apparatus of an endless belt,rotary drums for l carrying the belt, a table 0 n which the drums aremounted, a carrier to which said table is flexibly connected for endwisemovement shaft and devices thereon for imparting a lateral movement tothe carrier, means for reciprocating said table longitudinallysimultaneously with the lateral movement of the carrier, and a clutchmechanism including a clutch member,

shaft and. a rod universa member, said clutch eccentric and clutch aneccentric on the lly jointed to the member being operative to rotate thedrums in one direction to shift the belt independently of the table.

4. The combination in a paratus, of an endless drums by which theadvanced, means belt belt,

concentrating apa table carrying is supported and for reciprocating thetable longitudinally with the drums, a carrier, links connecting saidtable and the carrier whereby the table is permitted to reciprocatelongitudinally independently of the carrier, a driving shaft,connections at opposite ends of the shaft between said shaft and saidcarrier for imparting to the carrier and its superposed table and thebelt a ment, a clutch at the head end lateral moveof the table,

a crank on the end of said shaft and a link universally ointed theretoand operating the clutch for revolving the drums to advance the beltsimultaneously wi ciprocation of the belt In testimony whereof I th. theforward recarrying table.

have hereunto set my hand in the presence of two subscribing witnesses.

lVitnesses CHARLES EDELMAN, C. J. SWENsON.

Washington, I). G. M

KARL SEN N.

g the Commissioner of Patents,

